Roll ramming apparatus.



H. P. MACDONALD.

ROLL RAMMING APPARATUS.

APPLICATION FILED NOV.19, 1912.

Patented Feb. 11, 1913.

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WITNESSES. W

goons in forming molds for castings whivh haw dnvp pouhnis cores, and it main-vs the. pznxking of sand for such poriions in the progwr dogrw; ihnroby improving ihu mnids and hwing iOSSFS from reakage or failing away in a minin'mm.

Another advan gc of the oonstruuiion that it is espwialiy useful to compact the sand more donsviy at poiuis at which the Misting iikdy to strain, that \Yhorv (ho pressure of the mohon metal greatest when (he mold hoinfg; poured.

Har ng hus dssvrihod my invention and iliusimhrd i; usew hat I ciaim as new and desiro msrmnijii}. ilon'rs Paieni, the foi ind-ring.

1. A roi! rzn'mring; apparatus comprising in munbinaiimn v! hash, a ramming roll, a

3 k0 2i" pvevoding: the ro'ii, and b Mike-oi? nirvn'ted to sand 31 a pends mm, s: manning roll, r r blrflii pruvoiiing iii: 1'01]. 21 amp For w;- roii adn led io suppori the roll and innns on the support 1;. friko-oii' to have deeper min-1'! '51! a piodniormirwd point in comprising in ('ombiunion, a flasln a ramming roih a variai'rio sii 'iinroii prwmiing tho foil, :1 sup port for ho r552 mhzptnd 1o simport, the roll over the flask, and cam means on the support for elevating the strike-01f to leave a deeper portion of sand at a predetermined point in the flash.

4. A roll ramming apparatus comprising in conibiuaiion, a flask, a ramming roll pro- \idod with a variable strike-01f, a support for su 'iporting the roll over the flask, means on the strikoofl engaging the support, and mun means on the support adapted to elevate the strike-off and loave a deeper portion of the sand in the flask at a predetermined point.

5 A roll ramming apparatus comprising in rombiuation, a flask, a ramming roll provided with a variable strike-off, apair of ranks for supporting the roll over the flask, a pair of xx'i'ioels on the strike-ofi adapted to rim on the tracks and a pair of cams mounted on the tracks in position to be engaged b; (be wheels, whereby the strike-ofi' ohwatod.

6. A roii ramming apparatus comprising in cm'nhination, a flask, a ramming roll, a support for the roll adapted to support it over the flask, a variable strike-0fi', camming means dotac-hably carried on the sup- ,oort adapted to be engaged by the strik-ofl, and a plurality of cam positioning means on the support whereby the position of the cumming means may be varied.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed WiiIlQSSGS.

HARRY P. MACDONALD.

Witnesses:

J. F. ARNOLD:

C. C. GBEENLEE, Jr. 

